great compression at 5k feet
why not just put in new valve step seals, and run it.
only complaint was smoke so.?
did it smoke cold or hot, only, did it smoke only at start up or all the time, or only start up and only going down hills in gear , foot off gas pedal.?
to do rings you'd need to hone it.
new pistons do nothing, unless cracked or damaged, the rings do all sealing. (but we measure ring gape clearances too... top or bottom to edges of lands, (land to ring gaps) more are found ok, )
but valve seals are 1st.
seem to me its just those and engine has some life.. check rings on#1 yet for sticking, might be just carbon fouling there.(carbon in the top lands )??
carbon on top of pistion is running in limphome all the time rich.
a good EFI burns pure clean,. no carbon. but what you see there may be and echo of other owners running it rich in limphome.... long ago.
you only measured, cylinder taper, not out of round.? as out of round is the bad one.... rings can seal good tapered Top/down but not out or round much.
imagine a perfect circle in inside one that is not./ bingo no seal up.
we check 4 readings per cylinder to get both data. taper and out of round./
why not just put in new valve step seals, and run it.
only complaint was smoke so.?
did it smoke cold or hot, only, did it smoke only at start up or all the time, or only start up and only going down hills in gear , foot off gas pedal.?
to do rings you'd need to hone it.
new pistons do nothing, unless cracked or damaged, the rings do all sealing. (but we measure ring gape clearances too... top or bottom to edges of lands, (land to ring gaps) more are found ok, )
but valve seals are 1st.
seem to me its just those and engine has some life.. check rings on#1 yet for sticking, might be just carbon fouling there.(carbon in the top lands )??
carbon on top of pistion is running in limphome all the time rich.
a good EFI burns pure clean,. no carbon. but what you see there may be and echo of other owners running it rich in limphome.... long ago.
you only measured, cylinder taper, not out of round.? as out of round is the bad one.... rings can seal good tapered Top/down but not out or round much.
imagine a perfect circle in inside one that is not./ bingo no seal up.
we check 4 readings per cylinder to get both data. taper and out of round./
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